軟件：simplicity stdio 、ubuntu18.04
芯片：EFR32MG21A020F768(設備)，EFR32MG1P233F256GM48（ncp）
SDK:6.6.3
參考文檔：AN728、
服務器：
在simplicity stdio 生成Z3gatewayHost ,然後按默認操作再ubuntu裏面編譯，編譯成功後會有可執行文件，命名爲Z3gatewayHost，將後面需要升級的ota文件放到ota-files這個文件夾
ncp：
先生成BootLoader，
步驟：
1.看下圖
2.打開hwconf文件，更改usart0 的流控模式爲軟件流控（Xon-Xoff）,然後生成編譯，可執行文件命令爲EFR32MG1P233F256GM48_bootloader-uart-xmodem-combined.s37
再生成ncp：
1.看圖
2. 如下圖，聲明一點，我這裏用的是usart1
3.如下圖
4.如下圖
生成編譯，固件命名爲ncp-uart-sw.s37
設備：
生成BootLoader：BootLoader生成跟平時的一樣但是裏面的改動看圖片
下面就是改動後的
生成編譯，固件命名爲bootloader-storage-internal-single_MG21A.s37
生成應用程序，按照AN728文檔的步驟，一步步來，不同的地方如下圖
生成編譯，固件爲SwitchSoc_Endpoint4.s37（version 1）；
複製出來，將版本號改爲version2 ，重新編譯，將它複製到項目ota-files文件下；
將EFR32MG1P233F256GM48_bootloader-uart-xmodem-combined.s37和ncp-uart-sw.s37下載到EFR32MG1P233F256GM48芯片的設備，此設備跟電腦usb連接；
將bootloader-storage-internal-single_MG21A.s37和SwitchSoc_Endpoint4.s37（version 1）下載到EFR32MG21A020F768(設備)上；
在ubuntu上運行Z3GatewayHost, 打開網絡，允許設備入網；
設備加網，執行ota命令，進行ota升級，在此過程，設備會發ota升級請求幀給網關，網關查看對比兩個固件的版本是否一致，如果網關的固件版本比設備的固件版本高的話，就進行升級，整個過程大概8分鐘；
開始：
[2019-09-17 17:01:31.092]# RECV ASCII>
Processing message: len=19 profile=0104 cluster=0019
T00000000:RX len 19, ep 01, clus 0x0019 (Over the Air Bootloading) FC 19 seq 05 cmd 07 payload[02 10 00 00 04 00 00 00 00 00 00 00 00 00 00 00 ]
OTA command from unrecognized server 0x0000. My OTA server: 0xFFFD
Error: failed parsing OTA cmd 0x07
T00000000:TX (resp) Ucast 0x00
TX buffer: [00 05 0B 07 7E ]
[2019-09-17 17:03:42.982]# RECV ASCII>
Processing message: len=6 profile=0000 cluster=8006
Setting OTA Server to 0x0000
[2019-09-17 17:03:45.009]# RECV ASCII>
Bootload state: Get OTA Server EUI
OTA Cluster: setting IEEE address of OTA cluster
Last offset downloaded: 0x00000000
No image found in storage.
Processing message: len=16 profile=0104 cluster=0019
T00000000:RX len 16, ep 01, clus 0x0019 (Over the Air Bootloading) FC 19 seq 06 cmd 02 payload[00 02 10 00 00 04 00 00 00 F6 71 03 00 ]
Query next image response: New image is available for download.
Starting download, Version 0x00000004
Bootload state: Downloading Image
Starting erase from offset 0x0
[2019-09-17 17:03:45.094]# RECV ASCII>
0060000 to 0x000BC000
[2019-09-17 17:03:46.176]# RECV ASCII>
EEPROM Erase complete
Processing message: len=80 profile=0104 cluster=0019
T00000000:RX len 80, ep 01, clus 0x0019 (Over the Air Bootloading) FC 19 seq 07 cmd 05 payload[00 02 10 00 00 04 00 00 00 00 00 00 00 3F 1E F1 EE 0B 00 01 38 00 00 00 02 10 00 00 04 00 00 00 02 00 45 42 4C 20 53 77 69 74 63 68 53 6F 63 5F 45 6E 64 70 6F 69 6E 74 34 00 00 00 00 00 00 00 00 00 F6 71 03 00 00 00 B8 71 03 00 EB ]
Download: 0% complete
[2019-09-17 17:03:46.280]# RECV ASCII>
Processing message: len=80 profile=0104 cluster=0019
T00000000:RX len 80, ep 01, clus 0x0019 (Over the Air Bootloading) FC 19 seq 08 cmd 05 payload[00 02 10 00 00 04 00 00 00 3F 00 00 00 3F 17 A6 03 08 00 00 00 00 00 00 03 00 00 00 00 F4 0A 0A F4 1C 00 00 00 01 00 00 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FD 03 03 FD B0 00 00 00 00 40 00 00 ]
…………
…………
T00000000:RX len 19, ep 01, clus 0x0019 (Over the Air Bootloading) FC 19 seq 07 cmd 07 payload[02 10 00 00 04 00 00 00 00 00 00 00 00 00 00 00 ]
OTA Cluster: wait for 0 s
RXed timeOut 0x00000000 s, MAX timeOut 0x00000DBB s
Adding 3000 ms. delay for immediate upgrade.
Countdown to upgrade: 3000 ms
Bootload state: Co
[2019-09-17 17:10:12.733]# RECV ASCII>
untdown to Upgrade
[2019-09-17 17:10:15.705]# RECV ASCII>
Applying upgrade
Executing bootload callback.
[2019-09-17 17:10:21.266]# RECV ASCII>
Reset info: 0x02 (BTL)
Extended Reset info: 0x0201 (GO )
[2019-09-17 17:10:21.379]# RECV ASCII>
init pass
EEPROM init: 0x00
EMBER_NETWORK_UP 0xB0DC
Bootload state: Random Delay before start
Delaying 55 seconds before starting OTA client